Send client to another workspace.

Hello.

I am trying to create a keybinding that will send the current client to
a named workspace.

In the scripts collection there is a "send_to_ws.lua" but it uses a
WMPlex.lnth() method that does not exist in 3rc-20070720 and I can't
find when it dissapeard or what it was renamed to.

The best result I got was with

defbindings("WMPlex",
    {
	submap(PREFIX,
	    {
		kpress("H", "WGroup.attach(ioncore.lookup_region('Hidden'), _sub)"),
	    }
	),
    }
)

where Hidden is the name of a "WGroupWS". I also tried looking in the
saved_layout.lua file and tried all the names there (like WGroupCW<1>)
but even though the client is sent it never attaches cleanly in the
frame.

As I don't quite understand the object model in ion/lua I am certain I
am doing some simple error but what?

Jan J